Yea, I'm not impresses with Arkym either. I had their front lip (destroyed by vandals) and have their rear diffuser. From a distance the diffuser looks good but, up close the craftsmanship is poor. The carbon fiber doesn't go all the way to the bumper, it just sort of ends...looks incomplete. Other diffusers have the carbon fiber that wraps around the top of the diffuser all the way to where it meets the bumper. Piss poor attention to detail.
2011 Le Mans Blue M3// Black extended Novillo w/ Blue Grey Aluminum trim/DCT/ZTP/ZCW/ZPP/ZCP Premium Sound ///Akrapovic Evolution Exhaust
2015 Audi S4 Prestige, Brilliant Black S-tronic
2012 Le Mans Blue 135i M Pkg DCT